Pyrogenic process zinc smelting system
A technology of zinc smelting and pyrotechnics, applied in the field of pyrometallic zinc smelting, which can solve the problems of complex process, high energy consumption, low zinc recovery rate, etc., and achieve high recovery rate, large amount of stored melt, and high production rate Effect
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[0052] Example 1
[0053] Combine zinc concentrate (containing Zn: 50%) and slagging agent (FeO, SiO 2 And CaO) is directly added from the feeding port set in the melting zone of the Bref furnace, oxygen-enriched air is sprayed into the Bref furnace from the side of the melting zone of the Bref furnace, and then the zinc concentrate and oxygen-enriched air are oxidized and smelted to obtain flue gas and high zinc Scum. Bref furnace smelting zone flue gas SO 2 When the content is greater than 20%, the temperature is cooled by the waste heat boiler, the dust is collected by the electrostatic precipitator, and the flue gas is sent to make acid. The slag type of high zinc slag is ZnO-FeO-SiO 2 Type, ZnO-FeO-SiO 2 -CaO type, ZnO-FeO-SiO 2 -CaO-ZnO type. The oxygen concentration in oxygen-enriched air is 60%, and the melting temperature in the melting zone of the Bref furnace is 1300°C.
[0054] The above-mentioned high zinc slag enters the electric heating reduction zone of the Bref f...
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[0055] Example 2
[0056] The difference from Example 1 is: the smelting temperature in the electric reduction zone of the Bref furnace is 1300°C.
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[0057] Example 3
[0058] The difference from Example 1 is that the smelting temperature in the electric reduction zone of the Bref furnace is 1300°C first and then 1400°C. The electrothermal reduction zone of the Bref furnace obtains flue gas, slag and pig iron.
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